h1{
	text-align: center;
}
ul:after{
	content: "";
	display: block;
	visibility: hidden;
	clear: both;
}
ul{
	width:800px;
	margin:0 auto;
}
ul li{
	list-style: none;
	float:left;
	margin-right: 30px;
}
ul li:last-child{
	margin-right: 0px;
}
/*曲线阴影*/
.effect{
	position: relative;
	width:500px;
	height:200px;
	margin: 0 auto;
	background-color: #ffffff;
	box-shadow:0 1px 10px rgba(0,120,215,0.7);
	-webkit-box-shadow:0 1px 10px rgba(0,120,215,0.7);
	-moz-box-shadow:0 1px 10px rgba(0,120,215,0.7);
	-o-box-shadow:0 1px 10px rgba(0,120,215,0.7);
}
/*巧用:after和:before，加上绝对定位的特点，形成一个圆角矩形*/
.effect:after,.effect:before{
	position: absolute;
	content: "";
	z-index:-1;
	top:50%;
	bottom:0;
	left:10px;
	right:10px;
	box-shadow:0 0 20px rgba(0,120,215,0.9);
	-webkit-box-shadow:0 0 20px rgba(0,120,215,0.9);
	-moz-box-shadow:0 0 20px rgba(0,120,215,0.9);
	-o-box-shadow:0 0 20px rgba(0,120,215,0.9);
	border-radius: 100px/10px;
	-webkit-border-radius: 100px/10px;
	-moz-border-radius: 100px/10px;
	-o-border-radius: 100px/10px;
	/*border-radius：100px/10px,表示的是，水平方向的半径是100px，垂直方向是10px。*/
}
/*翘边阴影*/
.wrap li{
	position: relative;
	width:350px;
	height:250px;
	padding:10px;
	background: #fff;
	border:solid 1px #ccc;
	box-shadow: 0 0 15px rgba(0,0,0,0.2);
	-webkit-box-shadow: 0 0 15px rgba(0,0,0,0.2);
	-moz-box-shadow: 0 0 15px rgba(0,0,0,0.2);
	-o-box-shadow: 0 0 15px rgba(0,0,0,0.2);
}
.wrap li img{
	width:350px;
	height:250px;
}
.wrap li:before{
	position: absolute;
	content: "";
	z-index: -2;
	width:325px;
	height:220px;
	left:22px;
	bottom:13px;
	background: transparent;
	box-shadow: 0 5px 30px rgba(0,0,0,1);
	-webkit-box-shadow: 0 5px 30px rgba(0,0,0,1);
	-moz-box-shadow: 0 5px 30px rgba(0,0,0,1);
	-o-box-shadow: 0 5px 30px rgba(0,0,0,1);
	transform:skew(-15deg) rotate(-5deg);
	-webkit-transform:skew(-15deg) rotate(-5deg);
	-moz-transform:skew(-15deg) rotate(-5deg);
	-o-transform:skew(-15deg) rotate(-5deg);
}
.wrap li:after{
	position: absolute;
	content: "";
	z-index: -2;
	width:325px;
	height:220px;
	left:22px;
	bottom:13px;
	-webkit-box-shadow: 0 5px 30px rgba(0,0,0,0.9);
	-moz-box-shadow: 0 5px 30px rgba(0,0,0,0.9);
	-o-box-shadow: 0 5px 30px rgba(0,0,0,0.9);
	box-shadow: 0 5px 30px rgba(0,0,0,0.9);
	-moz-transform:skew(15deg) rotate(5deg);
	-o-transform:skew(15deg) rotate(5deg);
	-webkit-transform:skew(15deg) rotate(5deg);
	transform:skew(15deg) rotate(5deg);
}